51520504 has 32 divisors (see below), whose sum is σ = 111506400. Its totient is φ = 21859200.

The previous prime is 51520499. The next prime is 51520583. The reversal of 51520504 is 40502515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102 + ... + 10210.

It is an arithmetic number, because the mean of its divisors is an integer number (3484575).

Almost surely, 2^51520504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51520504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55753200).

51520504 is an abundant number, since it is smaller than the sum of its proper divisors (59985896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51520504 is a wasteful number, since it uses less digits than its factorization.

51520504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9223 (or 9219 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51520504 is about 7177.7784864121. The cubic root of 51520504 is about 372.1003121007.

The spelling of 51520504 in words is "fifty-one million, five hundred twenty thousand, five hundred four".